It seems to me that you are asking the wrong questions. I hope that we are not deciding who is Christian and who is not. Only God knows for sure, and He has not given me that particular responsibility - good thing too, or else a lot of people would be in big trouble, you betcha. You have heard us say, over and over, that we know where the Church, the Body of Christ, is (and has been for a couple of millenia, give or take) - but we don't know where it isn't.
This is the crucial point. The Orthodox Church is the Faith given by our Lord and Savior to the Apostles. Baptists, especially the American variety, appear to believe, preach and teach things that were not part of this deposit of faith - as we have discussed at great length on other threads.
Does this mean that Baptists are not Christian? Or our brethren? Or not good and Christ-loving people or that the Holy Spirit does not in some way work in their lives and hearts? My guess would be that they are all these things, but they are not part of the Apostolic Church, nor would most of them wish to be, if asked.
Again, we know where the Church, the Body of Christ is, in all its fullness and truth.
"It is self evident, however, that sincere Christians who are Roman Catholics, or Lutherans, or members, of other non-Orthodox confessions, cannot be termed renegades or heretics—i.e. those who knowingly pervert the truth...* They have been born and raised and are living according to the creed which they have inherited, just as do the majority of you who are Orthodox; in their lives there has not been a moment of personal and conscious renunciation of Orthodoxy. The Lord, "Who will have all men to be saved" (I Tim. 2:4) and "Who enlightens every man born into the world" (Jn. 1.43), undoubtedly is leading them also towards salvation In His own way.
With reference to the above question, it is particularly instructive to recall the answer once given to an inquirer by the Blessed Theophan the Recluse. The blessed one replied more or less thus: "You ask, will the heterodox be saved... Why do you worry about them? They have a Saviour Who desires the salvation of every human being. He will take care of them. You and I should not be burdened with such a concern. Study yourself and your own sins..." Metropolitan Philaret